Fahrenheit to Celsius Converter
Convert fahrenheit (°F) to celsius (°C) instantly. Free calculator with conversion table, formula, and examples.
1 °F=-17.2222 °C
Conversion Formula
How to convert fahrenheit to celsius mathematically.
This conversion uses a formula rather than a simple multiplication factor. Apply the formula above to convert between fahrenheit and celsius.
Fahrenheit to Celsius — Quick Reference
Common fahrenheit values and their celsius equivalents.
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| 0 °F | -17.7778 °C |
| 10 °F | -12.2222 °C |
| 32 °F | 0 °C |
| 50 °F | 10 °C |
| 68 °F | 20 °C |
| 72 °F | 22.2222 °C |
| 80 °F | 26.6667 °C |
| 98.6 °F | 37 °C |
| 100 °F | 37.7778 °C |
| 150 °F | 65.5556 °C |
| 212 °F | 100 °C |
When to Convert Fahrenheit to Celsius
Real-world scenarios where this conversion matters.
Travel to Metric Countries
American travelers visiting Europe, Asia, or South America encounter Celsius everywhere — from hotel AC controls to weather reports. Converting helps them understand local conditions and stay comfortable.
Science Homework
American students doing chemistry and physics need to work in Celsius (or Kelvin), since the scientific community universally uses the metric system. Converting lab temperatures from Fahrenheit is a daily task.
International Food Safety
Food safety guidelines vary by country, but many international standards use Celsius. Converting the USDA guideline of 165°F for poultry to 73.9°C helps when cooking abroad.
Swimming Pool Regulations
Many countries regulate pool temperatures in Celsius. A comfortable American pool at 82°F converts to about 27.8°C, helping pool managers abroad maintain the right temperature.
Step-by-Step Examples
Imagine you are setting the thermostat in a hotel room abroad. See the conversion process broken down.
- Start with 72 fahrenheit
- Apply the conversion formula: °C = (°F − 32) × 5/9
- Calculate: 72 → 22.2222 °C
- Result: 72 °F = 22.2222 °C
Result: 22.2222 °C
- Start with 212 fahrenheit
- Apply the conversion formula: °C = (°F − 32) × 5/9
- Calculate: 212 → 100 °C
- Result: 212 °F = 100 °C
Result: 100 °C
Did You Know?
Daniel Gabriel Fahrenheit created his scale in 1724. He set 0°F as the temperature of a mixture of ice, water, and ammonium chloride (the coldest he could reliably reproduce), and roughly 96°F as human body temperature.
Frequently Asked Questions
Common questions about converting fahrenheit to celsius.
The formula is: °C = (°F - 32) × 5/9. Subtract 32 from the Fahrenheit temperature, then multiply by 5 and divide by 9.
72°F equals approximately 22.2°C. This is considered a comfortable room temperature in both measurement systems.
98.6°F equals exactly 37°C. This is the commonly cited normal human body temperature, though individual normal temperatures can vary slightly.
Room temperature is typically considered 20-22°C, which equals 68-72°F. This range is used as the standard ambient temperature in science and is comfortable for most people.
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